Carburetor



Oct. 16, 192s. 1,688,02Q

R. M. SWEARENGlN CARBURETOR Filed Aug. 19, 1925 Patented Oct. k16, 1928.

'RUBIN MILLARD SWEARENGIN, or BIRMINGHAM, ALABAMA.

CARBURE'JJOR.V

Application filed August 19, 1925.

body of gasoline or other volatile fuel which' is maintained ysubstantially at a constant level, there being an air intake Vat one end and a mixture discharge at the other with an interposed baille, preferably of corrugated type, under. which the air is forred to flow in traversing the tank and which is pivoted so that its free end can be adjusted relatively 2o to the gasoline level, thereby controlling the carbureting action of the carburetor. My invention further contemplates co-ordi'nating the Aadjustment of the air baille in the carburetor with the air intake or butterfly valve `in the air connection tothe intake manifold,thereby effecting an automatic control of the mixture.

Myinvention further comprises novel details in the construction of the carburetor tank, all of which will be more clearly unl derstood by reference to the following specification and to the accompanying drawings, in which z A vFig. 1 is a perspective View paitly broken away illustratingmy improved carburetor.r Fig. 2 is a longitudinal sectional view on the line `2--2 of Fig. 1.

'Fig 3 is a transverse cross-sectional view en the line 3-3 of Fig. 2. Y

Similar reference numerals refer to similar parts throughout the drawings. l

In the embodiment of myinvention illustrated in the drawings, I show conventionally an intake manifold 1 having a supply a line 2 leading thereto and containing a check valve 3. This Vsupply line 2 leads from a pipe 4 having air inlet ports 5 at its upper end and between said ports and the connection for the line 2 is interposed a butterflyr .50 valve 6. A guard 7 is rigidly mounted in spaced relation above the air ports 5 and a bell crank 8 is fast on the butterfly valve stem and has one end connected to a control rod 9 leading from the dash or from 55 any gas control element of the car and has Serial No. 51v 182.

end of the tank has an intermediate horizontal baille 17 interposed'between lthe top air Thisf .tankv y A correy sponding transverse chamber l16 at the other inlet holes 18 and [air yinlet holes .19 ina lower baille plate 20. Belowy the yairports 19 I arrange several bailles 21, attached to the end wall 22 of 'the tank which is preferably deeper than the other end `wall 23, so that the bottom 24 of the tank Apitches downwardly towards the end wall 22. I arrange transversely across the bottom of the tank a series of baffles 25 having bottom notches orV ports 26 to'permit the gasoline or other volatile fuel therein to seek a 'common level in the tank.' I provide a supply chamber 27 for the gasoline mounted on the wall 22 and having ports. 28 near its bottom through which the fuel vwill flow vinto the-tank 14.y

AA. iloat 29 in the tank 27 controls an inlet needle valve 30 which admits the liquid fuel from a supply pipeffl and acts to maintain a substantially constant levelv in the tank 14. The chamber 27 has a removable cover 32 by means of which access may be had to the valve: mechanism. The corrugated baille, 13

is vpivotally mounted on a cross rod33 which is set so closely' againstrthe top Wall of the tank that substantially all ofthe entering air is forced to travel under .the` baille to reach the outletk chamber 15, sincethe sides of the baille engage slidably the sides of the tank. Thetank has a priming cap 34 and a drain cock 35.

. The operation of the device'is as follows.

Having filled the tank withliquid fuel, thel control rod 9 is moved to set'the parts in Ythe position lshown in Fig. 2 so that the entering air is forced, throughout the ymajor portion of its travel, .into intimate contact with the fuel'and 'is thusdelivered as a rich mixture to the intake manifold, which is desirable on starting. As the motor speeds up, the bell crank is shifted vby the control rod 9 so as to lift the baille, thus thinning the mixture until, when fully raised, the thinnest mixture is obtained and the butterflly valve 6 is closed. The baiiles 25 keep the. fuel from splashing too muchand the float valve maintains its constant level. If desired, a longitudinal baille 36 may be employed to reduce transverse splashing in the tank.

Though I have described with great particularity the details of the embodiment of the invention herein shown, it is not to be construed Ithat I am limited thereto, as changes in arrangement and substitution of equivalents may be made-by those skilled in the art without departing from the invention as defined in the appended claims.

Having thus described my invention, what I. claim as new and desire to secure by Letters Patent; is

l. In a carburetor, a liquid fuel tank havng spaced air inlet and outlet ports, a movable baiile interposed between said ports and disposed to overlie the fuel at an acute angle so as to force the air in traversing the tank to flow between the opposed surfaces of the baille and the fuel, and a remote control means to move the baille and regulate the air passage from beneath the bafile to vary the richness of the carbureted mixture.

2. A carburetor comprising a chamber having means to maintain liquid fuel therein at a substantially constant level, means to admit air and to discharge av carbureted mixture from said chamber, a baiile provided i in the chamber and so disposed as to cause the air Vto flow between the surface of the baiiie and thesurface ofthe liquid fuel and to pass outwardly from the chamber under one edge of said baffle, and control means for the baiile to adjust said edge with respect to the liquid fuel surface.

3. A carburetor comprising a chamber and means to maintain a substantially constant level of liquid fuel therein, means to admit air to thechainber, an outlet for the carbureted mixture, a hinged baille adapted to cause the entering` air to iiow between it and the fuel in passing to said-outlet, a pipe leading from said outlet to an engine manifold, an auxiliary air valve for admitting air to said pipe, and a common control for adjusting-said valve and bai'lie to regulate the fuel mixture.

l. A carburetor comprising an elongated i tank having means to maintain liquid fuel at a substantially constant level therein, an air inlet near one end of the tank, a hinged baffle adapted to force -theair entering said inlet to pass under it and in surface contact with said fuel, an outlet forithe carbureted mixture, a pipe for conducting' said mixture to the intake manifold of an engine, a valve for admitting air to said pipe, and means to jointly control said valve andy baffle to close the air valve as the clearance between the baiile and fuel level is increased, and vice versa.

5. The combination with an air supply in the tank, means to cause air iiowing through the tank to pass between the fuelV and said baie, and an operating connection between the air valve and baffle for joint operation, substantially as described.

6. A carburetor comprising a tank and means to maintain liquid fuel at a substantially constant level therein, means to pass an air current through the tank over the fuel surface, and an adjustable elongated corrugated baiiie coacting with the tank sides to deiine a passageway for the air current, said baille being substantially coextensive in length with the tank and having its corrugathe air current thereunder.

7. A carburetor comprisinga tank and means to maintain liquidfuel at a substantially constant level therein, means to pass anl air current through the tank over the fuel, a baffle hinged tothe tank near its air intake end and terminating near its other end close to the surface of the liquid having slidable engagement with the tanksides so as to form a restricted leaving passage for the air, and means independent of the iirst mentioned means to adjust the position of the baille relative to the fuel level.

8. A carburetor comprising a. liquid fuel tank, inc-ans to maintain a constantlevel of fuel in the tank, a member angularly disposed above the liquid fuel and deiiningwith the walls of the tank and the surface of the fuel a passage of gradually decreasing area, means for passing a current of air through said' passage in the direction of its decreasing area and outwardly between one edge of said member and the surface of the liquid, and means to vary the angular rela-tion ofv the member with respect to the liquid fuel surface. Y

f In testimony whereof I atliX mv signature.

RUBIN MILLARD SVJEAPENGIN.

tions extending in the direction ofiiow ofy (it)v 

